d3 force layout repulsive charge formula

Question

Is there a way to alter the formula D3 uses for calculating the charge's repulsive force in a force layout?

It was previously stated that the D3 charge force follows the inverse-square law. But, I want to make the force decay even faster as the distance between nodes increases. I want to make the formula behave something more like charge/distance^3 or charge/distance^4 so that nodes only significantly repel each other when they're very close to each other.

Answer 1

Yes, you can modify the source code. The relevant file is here, in particular the repulse function. What's currently

var k = quad.charge * dn * dn;

you could change to

var k = quad.charge * dn * dn * dn;